Improvement in machines for making brace-jaws for steam-boilers



2 shets sheet 1;. J. H. BUTTERWORTH. MACHINE FOR MAKING ,BRAGB JAWS FOR STEAM BOILERS.

No. 36,878 Patented Nov. 4, 1862;.

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2 Sheets-Sheet 2'.

J. H. BU TTERWORTH. I MACHINE; FOR MAKING BRAGE JAWSFOR STEAM' BUILERS.

Patented Nov. 4, 1862.

n K CI I UNITED T E PAT QFFic JOSHUA H. BU rcr RwonrH, or Doves, new JERSEY, Assienoa T0 HIM- SELF AND HENRY MOFARLAN, OF SAME PLACE.

IMPROVEMENT m MACHINES FOR, MAKlNG BRACE-JAWS FOR MAM-contest Specification forming part of Letters Patent Iio. 36,878. dated November 3, 18(5).

WORTH,0f Dover, in the county of Morris and" State. of New Jersey, have invented a new and useful m Machine for Making theJziws of Iron Braces for Steam-Boilers and other Lurposes;, and I do hereby declare that the following is" a full,clear, and exact description of the same,

reference being had to the accompanying drawings, forming part of this specification,

in which- Figure l is a side elevation of the machine. Fig. 21s a central vertical section of the same parallel with Fig. 1. Fig. 3 is a plan of the same. Fig. this avertical section at right angles to Figs. 1 and 2, in the plane indicated by the line a; a: of Figs.-- 2-and-3. Fig. 5 is a vertical section parallel with Fig. 4,. in the plane indicated by the line 3/ y in Figs. 2 and 3. Figs. 6, 7, 8, 9, 10, and llillustrate the-forms which the iron assumes in the successivestages of the manufacture of the j aws.

, Similar letters of reference indicate corresponding parts in the several figures.

This machine is composedof bendingmechanism, pressing and forming dies, and mandre1s,'.so combined and arranged as to take a straight bar of iron-suchas shown in Fig. 6- doubleit to the form shown in Fig. 7, then by asecond doubling bring it to the form shown in Figs. 8 and 9, which are views taken at i right angles to each other, and afterward, by

the action of the pressing-dies and mandrels, to bring it to the form shown in Figs. 10 and '11, which are viewsof difierent sides of the To enable others to make and use my invention, 1 will proceed to describe it with reference to thedrawings. 1 i

A is a horizontal frame, on or in which all the working parts of the machine are supported; l

B is the main shaft, carrying the-camsby which the movements of the several parts of the machine are to be produced,arranged horizontally in fixed bearing'supon the frame.

0 isa horizontalv plate or table, upon which the piece of straight rod (represented iuFig. 6) cut toa proper length, and heatedtoa red heat, is. laid to be subjected to the first doubling operation to bring it to the; shape repre sented in Fig. 7. This operation is performed by means of a straight, fiat, vertical. plunger, 1'), which drives it down between twor'ollers, a a, arranged at suitable distances apart in suitable fixed bearings in the said plate.

To insure the bending of the said. rod exactly at the middle of its length, a fixed step or gage, b, is suitably arranged nponthe table on the opposite side of the rollers to that from which the rod isplaced on the said plate, and by pushing the said rod up against this stop the middle of its length is brought directly under the plunger, and over the middle of the space between the rollers a a. The plunger 1) works through guides d d, and is made to derive the necessary movement downward and up ward once during every revolution of the-main shaft Bfrom the cam Hand 3. spring, D, said movementbeing transmitted through two le vers, D D, two rods, D* D and a rod, D, ar-

ranged as shown in Fig. 1, the lever D working on a fulcrum, d, and that D" on a fulcrum,

d, and the cam and spring acting directly upon the lever D", which is connected with the said spring by the rod (1, the said spring being secured to the frame A.

By the completion of the first doubling operation, as above described, the bend of this rod is brought down between two guides, c c, to a fixed'rest, c, (best shown in Fig/1,) while the extremities do not quite pass the axes of the rollers a a, and the doubled rod is left in v to the middleof thelength of the doubled, rod

that by the advance between ,the said rollers of a second flat plunger E working horizontally the rod may be doubled the second time, and thus brought to the shape shown in Figs. 8 and 9. The plunger E works through a I guide, 6, and derives its motion from the cam E" and a spring, E, the motion being impartedthrough a lever, E, with which thesaid plunger is connected at c, and which is kept in contact with the said cam by the said spring, which is attached to the frameA, andcon nected with the lever by a rod, e". By the completion of thissecond bending process the piece is delivered between t-he -two opposite form the eyes.

horizontally-moving dies, G .G, Figs. 3 and 5,

I moving mandrel'n may pass into the opening .m, (see Fig. 9,) to form an opening, m", of proper shape (see Fig. 11) between the sides of the ja\v,the said mandrel n being made forked to allow the mandrel m to work transversely through it. Thehorizontally-moving dies G G work through openings in the sides of a block, J, which is bolted onto a bed-piece, K, secured oii the main frame, the said block containing the bearings for the upper roller, 1", and having fitted to it thefisxed die H,-and the before-mentioned openings iifihe sides of the said block serving as guides to the dies G G. The said block has also an opening directly through it from back to front for the passage of the bar during the second doubling process and for the discharge of the finished bracejaw. It has also-another opening in one side for the admission of the stock M of the plunge'rfm, and 'an'-'-openiug-in the top for the admission of the plunger 21, the two latter openings serving as guides tothe plungers.

The duty of the dies'G G II I is to press together the portions of the twice-doubled bar, which is to form the neck 12, Figs.- ld'zand 11,

. of the jaw, the: dies G G operating to close the said portions at the back of the opening m formed hythe mandrel a, and the dies H and I operating in conjunction wit-lithe mandrel upon the top and bottom, or, more properly speaking, the front end back of the jaws to I The operation of the dies G G is produced once during every revolution of the main shaft B by the two cams GG through two rockshafts, G G, which are each furnished with two arms, g g, and are arranged parallel with each other, but at right angles to the main shaft 13, and slightly inclined from a horizon tal position in fixed hearings on theframe A.

These rock-shafts derive motion from the cams I thronghtheir two arms, g g, which carry friction rollers or stnds entering grooves in the cams, and the said rock-shafts transmit motion to the dies by the connection of the latter with their arms 9 y.

' 'The die I, which works through a vertical opening in the bed-piece K, has standing up from it, on opposite sides of its working-face,

two guide-pieces, z" i, at a distance apart equal to the external width 01' the jaws, and it derives motion upward and downward once during every revolution of the main shaft from the cam I" and a spring, I". The said die is supported upon a lever, 1, Fig. 2, which works on a fixed fulcrum, i, and which has applied below it a toggle, I I, the lower link of which oscillates from a fixed bearing, and to the joint i of which there is connected a rod, I,,-'the opposite end of which is connected with a lever, 1, which is always kept in contactwith the cam I by means of the. spring I, which is attached to the frame and connected with the said lever by a rod, i.

The mandrel m is operated by means of a grooved cam, M, through the agency of a rock-shaft, M, which has two arms, M M, and which is arranged in a-nearly horizontal po-- sition and at right angles to the main shaft in fixed bearings at one side of the framing A. The said cam acts upon a stud attached to the arm M to produce the'oscillation of the shaft,

and the arm M has the stock of the mandrel connected with it.

The mandrel u isoperated -hy the cam N and a spring, N". The said mandrel is sus pended from the arm N of a horizontal rock shaft, N, another arm, N of which is connected with a lever, N, which iskept in contact with the cam by the spring N, which is secured to the frame and connected with the lever by a rod, N

The operations of the several parts of the machine are successively performed as follows: The plunger D descends and produces the first. doubling of the piece of iron and quickly rises again to get out of the way 01. the plunger 1*], which then advances to effect the second-doubling operation and ret res quickly, leaving the iron between the dies G G H I,'and in 'front of a projection, 2', proyided on the bed K, to prevent it from going back-with the plunger E. The mandrel n j then commences its descent into thepopening' m, (see Fig. 9,) which is quickly followed by the movement of the mandrel m into the bend n. (See Fig. 8.) \Vhen the mandrels have been thus inserted, the simultaneous advance of the dies G G and upward movement of the die I complete the manufacture of the jaw and bring it to the shape represented in Figs. 10 and 11 ready to be welded to the brace. The retirement of the dies G G from the jaw and'descent of the die I leaves the work free to be pushed forward out of the machine by the next operation of the bendingmandrel E to bend the next bar. While one jaw is being finished the bar to make the next one is being subjected to the first bending operation by the plunger D, so that a jaw is.

turned :out complete at every revolution of the shaft, the cams severally operating once jaw and forming the eye therein. By the use of two mandrels in this manner I am enabled to make both eyes exactlylof the same size, whereas, owing to the necessity of the mandrel being slightly taper one of the eyes formed by the long mandrel inserted through the jaw from one side will be somewhat larger than the other.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is-' 1.: The combination of the two plnng'ers D and E and their respective rollers are and ff,-

arranged and operating, as described, to bring that shown in Figs. 8 and 9.

2. The combination of thedies G G, H,'and

I, and the mandrels m and n, the wholcfar ranged and operated substantially as and for the purpose herein specified.

3. Constructing the mandrel n in a forked form to allow the passage of the mandrel m through it, substantially as herein described.

, 4. Thecombination of the plungers D E,

rollers a a f f, dies G-G H I, and mandrels m i-th Whole arranged to operate substantially as' 'herein specified.

the bar from the condition shown in Fig. 6, to'

JOSHUA H. BUTTERWORTH.

Witnesses; a

a G. M. HI'NQHMAN, J OHN G. MARE. 

